HYBR-001 Rin Saetsuki, a relative's aunt who came to Tokyo for the exam for 2 days and 1 night

I decided to go to Tokyo from the countryside for an examination, so I decided to stay at the house of my relative's aunt who lives in Tokyo. My mother's younger sister, my aunt, was a beautiful woman, but she was still a single child, but she longed to be a sophisticated and beautiful woman in the city. On the way back to the room where I accidentally drank the energy booster, my aunt's room door was a little open and I was urged to ...